Patent US5344723A successfully refreshed from Google Patents.
US5344723A
Expired / Lapsed
US
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Bipolar electrode for batteries
Assignee: SORAPEC SA
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Filing: 1993-03-24
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Granted: 1994-09-06
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Expires: 2013-03-24
Abstract
Abstract Bipolar electrode is provided with a conductive support/separator perforated on a part which is free from active material with at least one opening which communicates by a gaseous environment in a battery between elements assembled in series. The opening prevents the passage of electrolyte from one conductive support/separator to another, and may include an advantageously hydrophobic material, which also contains an opening therethrough, and is arranged on at least one side of the opening. The bipolar electrodes are particularly applicable to sealed batteries.
Inventors
- 👤 Guy Bronoel
- 👤 Bernard Bugnet
- 👤 Noelle Tassin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:22
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/64; H01M4/66; H01M4/665; H01M4/667; H01M10/00; H01M10/04; H01M10/0413; H01M10/0418; H01M10/24; H01M10/28; H01M10/281; H01M10/282; H01M4/24; H01M4/70; H01M4/80; H01M50/00; H01M50/30; H01M10/30; H01M4/661; H01M4/72; H01M4/808; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y02P; Y02P70/00; Y02P70/50; Y10; Y10T; Y10T29/00; Y10T29/10
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
65 words
A bipolar electrode for a battery, comprising: a conductive separator comprising a support including at least two portions; an active material on one of said two portions, and the other of said two portions being free from active material; and means defining at least one opening in said other of said two portions for permitting ambient gas to pass therethrough and preventing passage of electrolyte.
Claim 2
Dependent Claim
65 words
A bipolar electrode for a battery, comprising: a conductive separator comprising a support including at least two portions; an active material on one of said two portions, and the other of said two portions being free from active material; and means defining at least one opening in said other of said two portions for permitting ambient gas to pass therethrough and preventing passage of electrolyte.
Claim 3
Dependent Claim
29 words
The bipolar electrode according to claim 1, wherein said means defining at least one opening comprise at least one opening of a diameter of between 0.1 and 0.5 mm.
Claim 4
Dependent Claim
35 words
The bipolar electrode according to claim 1, wherein said means defining at least one opening comprise from one to four openings for permitting ambient gas to pass through said opening and preventing passage of electrolyte.
Claim 5
Dependent Claim
19 words
The bipolar electrode according to claim 3, wherein said openings have a diameter of between 0.1 and 0.5 mm.
Claim 6
Dependent Claim
56 words
The bipolar electrode according to claim 1, wherein said means defining at least one opening comprise at least one open area in said support, at least one element associated with said at least one open area extending from at least one side of said support, and at least one aperture in said at least one element.
Claim 7
Dependent Claim
32 words
The bipolar electrode according to claim 5, wherein said at least one element is positioned in said at least one open area, and includes one aperture through said at least one element.
Claim 8
Dependent Claim
31 words
The bipolar electrode according to claim 5, wherein said at least one element comprises two elements on opposite sides of said support, and each of said two elements comprises an aperture.
Claim 9
Dependent Claim
29 words
The bipolar electrode according to claim 7, wherein said at least one open area has a smaller diameter than diameters of the aperture in each of said two elements.
Claim 10
Dependent Claim
20 words
The bipolar electrode according to claim 8, wherein the apertures in each of said two elements have substantially equal diameters.
Claim 11
Dependent Claim
19 words
The bipolar electrode according to claim 5, wherein said at least one element comprises a material having hydrophobic properties.
Claim 12
Dependent Claim
15 words
The bipolar electrode according to claim 10, wherein said material having hydrophobic properties comprises polytetrafluoroethylene.
Claim 13
Dependent Claim
41 words
The bipolar electrode according to claim 1, wherein said means defining at least one opening comprise at least one open area in said support, and a microporous membrane covering said at least one open area on each side of said support.
Claim 14
Dependent Claim
22 words
The bipolar electrode according to claim 12, further including a washer positioned between each microporous membrane and each side of said support.
Claim 15
Dependent Claim
18 words
The bipolar electrode according to claim 1, wherein said support comprises a periphery comprising a plurality of apertures.
Claim 16
Dependent Claim
80 words
A battery, comprising: a plurality of bipolar electrodes, each of said plurality of bipolar electrodes comprising: a conductive separator comprising a support including at least two portions; an active material on one of said two portions, and the other of said two portions being free from active material; and means defining at least one opening in said other of said two portions for permitting ambient gas to pass therethrough and preventing passage of electrolyte between said plurality of bipolar electrodes.
Claim 17
Dependent Claim
80 words
A battery, comprising: a plurality of bipolar electrodes, each of said plurality of bipolar electrodes comprising: a conductive separator comprising a support including at least two portions; an active material on one of said two portions, and the other of said two portions being free from active material; and means defining at least one opening in said other of said two portions for permitting ambient gas to pass therethrough and preventing passage of electrolyte between said plurality of bipolar electrodes.
Claim 18
Dependent Claim
28 words
The battery according to claim 15, wherein said means defining at least one opening comprise at least one opening of a diameter of between 0.1 and 0.5 mm.
Claim 19
Dependent Claim
55 words
The battery according to claim 15, wherein said means defining at least one opening comprise at lest one open area in said support, at least one element associated with said at least one open area extending from at least one side of said support, and at least one aperture in said at least one element.
Claim 20
Dependent Claim
18 words
The battery according to claim 17, wherein said at least one element comprises a material having hydrophobic properties.
Claim 21
Dependent Claim
14 words
The battery according to claim 18, wherein said material having hydrophobic properties comprises polytetrafluoroethylene.
Claim 22
Dependent Claim
40 words
The battery according to claim 15, wherein said means defining at least one opening comprise at least one open area in said support, and a microporous membrane covering said at least one open area on each side of said support.
Claim 23
Dependent Claim
32 words
The battery according to claim 15, wherein said support comprises a periphery comprising a plurality of apertures, and the battery comprises an insulating structure within which said plurality of apertures is embedded.
Claim 24
Dependent Claim
33 words
The battery according to claim 15, wherein said battery further comprises end plates closing the battery, and further including at least one safety valve positioned on at least one of said end plates.
Claim 25
Independent Claim
142 words
A method of manufacturing a bipolar electrode comprising a conductive separator comprising a support including at least two portions; an active material on one of the two portions, and the other of the two portions being free from active material; and means defining at least one opening in the other of the two portions for permitting ambient gas to pass therethrough and preventing passage of electrolyte, the method comprising: forming at least one open area in the other of the two portions; force fitting a cylinder into the at least one open area, the cylinder having a center axis, two faces and a central portion between the two faces; forming a hole substantially through the center axis of the cylinder; positioning a wire in the hole; squashing the cylinder on the two faces while maintaining the central portion; and withdrawing the wire.
Claim 26
Independent Claim
142 words
A method of manufacturing a bipolar electrode comprising a conductive separator comprising a support including at least two portions; an active material on one of the two portions, and the other of the two portions being free from active material; and means defining at least one opening in the other of the two portions for permitting ambient gas to pass therethrough and preventing passage of electrolyte, the method comprising: forming at least one open area in the other of the two portions; force fitting a cylinder into the at least one open area, the cylinder having a center axis, two faces and a central portion between the two faces; forming a hole substantially through the center axis of the cylinder; positioning a wire in the hole; squashing the cylinder on the two faces while maintaining the central portion; and withdrawing the wire.
Claim 27
Dependent Claim
20 words
The method of manufacturing a bipolar electrode according to claim 23, wherein the cylinder is composed of a hydrophobic material.
Claim 28
Independent Claim
135 words
A method of manufacturing a bipolar electrode comprising a conductive separator comprising a support including at least two portions; an active material on one of the two portions, and the other of the two portions being free from active material; and means defining at least one opening in the other of the two portions for permitting ambient gas to pass therethrough and preventing passage of electrolyte, the method comprising: forming at least one open area in the other of the two portions; and adhering a disk comprising a central opening having a diameter which is equal to or slightly greater than a diameter of the at least one open area onto at least one side of the support so that the central opening of the disk is associated with the at least one open area.
Claim 29
Independent Claim
135 words
A method of manufacturing a bipolar electrode comprising a conductive separator comprising a support including at least two portions; an active material on one of the two portions, and the other of the two portions being free from active material; and means defining at least one opening in the other of the two portions for permitting ambient gas to pass therethrough and preventing passage of electrolyte, the method comprising: forming at least one open area in the other of the two portions; and adhering a disk comprising a central opening having a diameter which is equal to or slightly greater than a diameter of the at least one open area onto at least one side of the support so that the central opening of the disk is associated with the at least one open area.
Claim 30
Dependent Claim
20 words
The method of manufacturing a bipolar electrode according to claim 25, wherein the disk is composed of a hydrophobic material.
Claim 31
Dependent Claim
28 words
The method of manufacturing a bipolar electrode according to claim 25, comprising a porous or semi-permeable membrane positioned on the disk obturating the central opening of the disk.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-09-05 | 1998-03-07 | 1998-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-09-05 | 2002-03-07 | 2002-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-09-05 | 2006-03-07 | 2006-09-06 | $7700.00 | Window Closed / Lapsed |